Display screen or portion thereof with generated image



FIG. 1 is a front view of a display screen or portion thereof with generated image, showing our new design; and,

FIG. 2 is front view thereof, in which a display panel in broken line is provided to illustrate an example environment.

The broken lines are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with generated image, as shown and described. 